"Scholars interested in the growing literature on the history of time, progress, and the future will find this book valuable reading. It is a careful but clear work on intellectual history, one with particular relevance for understanding the significance of the French Revolution." - Meghan K. Roberts, Bowdoin College (H-France Review) "In this insightful, richly researched, and theoretically astute work, William Max Nelson views the Enlightenment not as era, movement, or project, but as ‘attempts to develop new ways of being in the world that could come to grips with the erosion of traditional notions of God and legitimating narratives of political authority and social hierarchy.’ … This book is a valuable and thought-provoking contribution to that process." - Daniel Brewer, University of Minnesota (French Studies) "This wide-ranging book makes a valuable contribution to a still fragmentary field of historical time studies." - Sanja Perovic, King’s College London (American Historical Review)